This looks like a museum floor tile where they put the directions to a certain exhibit which I think is really cool. It stands out against the normal brick, and is eye-catching whilst also being small and not really a big deal.
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Anshuman Ghosh's Playful Illusions Created with an iPhone - Anshuman Ghosh creates a quirky world using his iPhone. With seamless illusions, he transforms his device from a phone into a toaster, vase, and much more.